Wrench



' (No Model.)

Y J. 1v1. HARLAND.

WRENCH.

TNO..288,432. PatentedNov. 1a, 1883.

. PETERS. Fhalo-Lilhogm i shown.

` VUnirse- STATES .minis IM. HARLAND,

OF DAYTON, OHIO.

WRENCH.

SPECIFICATION forming part of Letters Patent No.`288,432, dated November13,` 1883.

Application filed September 4, 1883. (No model.)

T0 @ZZ whom it may concern: y I

Be it known thatI, JAMns M. HIRLAND, of Dayton, in the county ofMontgomery and State of Ohio, haveinvented a new and useful Improvementin Vrenclies; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use it, referencebeing had to the accompanying` drawings, forming a part thereof.

My invention relates to improvements in wrenches; and it consists `inthe construction, combination, and arrangement of the several parts, aswill be hereinafter more fully described, and `specifically pointed outin the claims.

In the drawings, Figures l and 2 are side views, and Fig. 3 is apartside and part sec-` tional view, of my wrench.

The wrench shown in Fig. 3 differs slightly in specific constructionfrom that shown in the other figures, but is in principle the same, aswill be described. y

The wrenchbar A is provided at one end with4 the handle A', and at theother end with the jaw A2, extended at right angles from what I call,for convenience of reference, the upper edge of the bar. On this upperedge, extending from the handle A almost to the jaw A2, I form a seriesof notches, ce.

The movable jaw B is provided with an opening tted to the bar A, onwhich it is placed and slides in the operation of the device. From therear side of this jawI project the flat bar b, which extends along closeto the bar A, and is beveled from its upper side at its rear end, asclearly shown.

The slide or carriage C isplaced on the bar A, and slides over the sameand the bar b, as shown. It is provided in its rear portion with amortise, c, opening onto the notched or upper edge of the bar A, andwithin which is placed the pawl or dog D, which is beveled on itsforward edge, and is forced into engagement withthe notches c by thespring d, as Slots d are cut through the walls of the carriage into themortise c, through which are passed the screws or studs d2, by which thepawl may be disengaged by hand from the notched or rack bar. In theforward portion of the carriage, in advance of the mortise c, I

may be turned from left to right.

form the recess c2, cut down from the upper 'edge of the carriage,leaving the front plate or wall, c3. y

The screwE is secured at its forward end to the jaw B, and extends backthrough wall or plate c3 into the recess c2. The thumb-nut E.

Vhaving milled edges, is turned on the rear end of thescrew in therecess c2, and this nut 1s and the carriage may be moved to any desiredVpoint, when by turning the nut slightly in an opposite direction the dogor pawl again engages the notches, and by a further turning of the screwamore delicate adjustment of th wrench is accomplished.

` A slightly different arrangement is shown in Fig. 3, in which theadjusting connectingscrew is swiveled to the jaw and provided with aburr, x, by which it may be revolved, and it is turned into a threadedsocket in the earriage. The pawl also is held by a dat instead of a coilspring; but it will be seen that the modifications are of form only, anddo not vary the principle of a rack wrench-bar, a fixed jaw, a carriagehaving a dog engaging said rack, a movable wrench-j aw, and anadjusting-screw connecting the movable jaw and carriage.

It is obvious that the dog might be disengaged by hand, and that thecarriage might be secured to the movable jaw by a more adjustableconnection; but I prefer the construction shown and described, becauseit is easy, certain in action, and quick, ready adjustments are therebyaccomplished.

Having thus described my invention, what I claim, and desire to secureby Letters Patent,

1. The combination, in a wrench, of the notched bar A, having fixed jawA2, the mov-.

able jaw B, having bar b, beveled at its rear and arranged to engage thepawl D, the car- IOO riage C. having spring-pawl D, beveled on itsrecess 02, the paWl D, spring d, screw E, and Io forward side, and theadjusting-screw oonnut E', al1 arranged and operating` as and fornecbing the carriage and the movable jaw, subthe purposes specified.

sbantially as specified. In testimony that I claim .the foregoing I 5 2.The Wrench7 substantially as described append my signature.

and shown, composed of .the bar provided on Y JAMES M. HARLAND.

its upper edge with notches and at its forward Vitnesses:

end with the iXed jaw, the movable jaw hav- VILLIAM HUKINs,

ing` bar b, the carriage having mortise'c and JOHN H. SPEIR.

